Add existing to tracked

node_modules/@cesium/engine/Source/Shaders/Materials/WaterMaskMaterial.js

@@ -0,0 +1,17 @@
+//This file is automatically rebuilt by the Cesium build process.
+export default "uniform vec4 waterColor;\n\
+uniform vec4 landColor;\n\
+\n\
+czm_material czm_getMaterial(czm_materialInput materialInput)\n\
+{\n\
+    czm_material material = czm_getDefaultMaterial(materialInput);\n\
+\n\
+    vec4 outColor = mix(landColor, waterColor, materialInput.waterMask);\n\
+    outColor = czm_gammaCorrect(outColor);\n\
+\n\
+    material.diffuse = outColor.rgb;\n\
+    material.alpha = outColor.a;\n\
+\n\
+    return material;\n\
+}\n\
+";